This page explains how Matthew Christo (USATT# 905)'s rating went from 1233 to 1218 at the 1998 Michigan State Championsh held on - 31 May 1998. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.